Coal-pick mounting



Aug. 18, 1925. l

C. C. lHANSEN coAL Picx MOUNTING d Nov. l2

Patented Aug. 18, 1925.

liniaalix U.N1'ri:nsrarss earner orales.

` Acranmas c. HANSEN, orVV Ensron, rnrmsvnvaivra, assieme?. fro rivennsoLL-nann COMPANY, or JERSEY Grrr, new massa', .aconronarroiv or 'NEW JERSEY.

occasion Mounmrne.

Application filed November 12, 1924. Serial i110. 749,373.

To all whom it may concer/n.' p

Beit known th at l, @Hannes G. HANSEN, a citizen of the United States, .and resident of Easton, `county of Northampton, and State of Pennsylvania, have invented :a certain Coal-Pick Mounting, of which the following is a specification, accompanied by drawings. y

This invention relates to mining machines, 'and more particularly to mountings for rock drills which are employed as coal picks for cutting and loosening coal in shallow seams where the use of explosives would be impractical, or for undercutting coal faces and similar mining operations.

The use of pneumatic drills in .coal mining operations has resulted in a greatly increased output and has reduced the expense of mining coal to a minimum. This is particularly true in removing shallow seams where, due to lack of head room, the operator is often forced into a stooping, and at times, a prone position. But as most drills of this type are designed to be supported by hand, it is therefore obvious that the operator is subjected to severe strains especially in the working of seams which lie in an inclined direction. In efforts to make the operation of picking coal less burdensome, ithas been found that through the use of a suitable mount-ing, the operator may not only be relieved of supporting the weight of the drill but that a drill thus mounted may be handled with greater facility.

It is an object of this invention to enable a hand supported pneumatic drill to be adjustably mounted for use as a coal pick.

Further objects will hereinafter become apparent in the following specificatie-n and description of the accompanying drawings, illustrating the invention in its preferred forms.

Figure l is a longitudinal side view showing a hand held hammer drill supported by a mounting constructed in accordance with the practice of the invention,

Figure 2 is a transverse vertical sectional view o f a hammer drill supported by the mounting taken along the line 2 2 of Figure 1, and looking in the direction of thc arrows,

Figin-'e 3 is a perspective view of .one half of the saddle, yand Figure d is a perspective view of a half section of the iianged guiding ring for a coal pick mounting.

Referring to the drawings, fluid actuated hammer drill having a cylinder A, a back head B and a front head Cis shown rotatively support-ed within cylindrical saddle members D; la. cylindrical guiding flange E formed as desired either integrally with the cylinder A or on detachable guiding rings F is designed to cooperate with the saddle members for rotating the rock drill about a longitudinal axis.

Trunnions G are formed integrally with the saddle. members D and are journaled within suitable bearings H. Legs J, K, and K mounted on the top faces of the runners L are designed to support the bearings H. An anchor O formed integrally with a grip member P is pivotally mounted on the rearward end of the runners L.

ln the .form illustrated in Figures l .and 2, the flange E is designed to cooperate with an annular groove Q and the bore R formed in the saddle members D for rotating the drill about its longitudinal axis. In assembling, the saddle members D are arranged about the cylinder A so that the annular groove Q will receive the guiding iiange E whereupon the bolt-s S are placed within the holes T of the saddle sections D for clamping the two sections D rigidly together. A

By making the diameters of the bore R and the annular groove Q, of the saddle D slightly larger than the diameters of the cylinder A and the flange E the drill is free to turn in the saddle. The runners L, longitudinally arranged on opposite sides of the drill, have upwardly curved forward ends U so as to ride easily on a rough floor, and are held in fixed relation to each other by means of a tie V fitting at its ends in bearings W on the supporting members J. The anchors O having grip members P are pivotally mounted on the heels of the runners L and are held by pins P. The legs or uprights J, K, and K mounted on the top face of the runners L and supporting the bearings H are preferably rmly secured to the bearings H by means of tap bolts X. Nuts Y are provided to hold the trunnions G from removal from the bearings H.

By the use of this mounting the operator is relie-ved of the strain of supporting the weight o1- the drill, this being especially desirable in cutting coal from a sharply inclined seam, where,` at times, the operator, in addition to supporting himselil finds it diiiicult to apply sufficient pressure against the rock drill to break the coal out.

In operation, the drill is` advanced until a cutting edge Z of a pick I) Vis in contact with the face c and the shank d of the pick ZJ extends well into the path of the recipro cating piston e (Figure 2), whereupon the points f of the anchors O are forced into the floor by pressing on the grips P. In this way the drill is held in a fixed position until the pick has been driven into the face c when theI drill may again be moved forward and anchored or to any other desired position along the face c.

I claim:

In a pneumatic coal pick the combination of a fluid actuated rock drill and a mounting therefor comprising a guiding flange secured to the cylinder oi' the rock drill, a saddle having a groove to cooperate with the guidingflange for rotating the rock drill about its longitudinal axis, trunnions on-the saddle to permit oscillation of the rock drill about a transverse axis, bearings for the trunnions, means including runners for supporting the bearings, and anchors pivoted on the rearward end oi' said runners to prevent backward movement of the pick.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

